Dri-FIT One Leggings
Nike's Dri-FIT One Leggings are 83% recycled polyester, 17% spandex. While Nike has made progress on using recycled polyester, the fabric remains 100% synthetic plastic. Dri-FIT technology maximizes fabric-to-skin contact by design, which maximizes microplastic and chemical exposure during exercise.
CRITICAL: Nike's Dri-FIT fabric is 83% polyester, 17% spandex — both fully synthetic plastics. Dri-FIT is specifically engineered to pull sweat toward the fabric surface, which means it is in constant, intimate contact with your skin during exercise. Polyester is the most prolific microplastic shedder of all synthetic fabrics.
Why We Rated It This Way
Nike scores the lowest in our clothing ratings due to 100% synthetic content, minimal supply chain transparency on chemical treatments, and no pathway to natural fiber activewear.
Chemical & Health Analysis
Polyester (PET) — Dri-FIT engineered fabric
Nike's Dri-FIT technology is specifically designed to maximize fabric-to-skin contact by wicking sweat toward the fabric surface. This engineering maximizes transdermal exposure to polyester microplastics and chemical additives during exercise — the opposite of what you want from a health perspective.
Antimony trioxide (PET catalyst)
Present in polyester as a manufacturing residue. Detected in sweat from people wearing polyester activewear. Classified as a possible human carcinogen (IARC Group 2B).
Optical brighteners (fluorescent whitening agents)
Used in Nike's white and light-colored fabrics. These UV-reactive chemicals are absorbed through skin and have been detected in human urine. Some are classified as endocrine disruptors.
All health claims are based on published, peer-reviewed research. PFR cites primary sources from the NIH, WHO, IARC, and peer-reviewed journals. This information is for educational purposes and does not constitute medical advice.
Synthetic Plastic Content
synthetic plastic fiber content by weight
